Should I Always Fully Qualify Column Names In SQL?

Question

Out of interest when working with SQL statements should I always use the fully qualifed column name (tablename.columnname) even if only working with one table e.g.

Answer 1

It's better if you do - it doesn't add any complexity, and it can prevent errors in the future.

But in a well-defined system, you shouldn't have to - it's like namespaces in programming languages. The ideal is not to have conflicts, but it can clutter the code with the superfluous use of explicit names.

-Adam